System Sensor WFD20 User Manual

D770-01-00 1 I56-459-07
WFD Vane-type Waterflow
Detectors
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Important
Please Read Carefully And Save
This instruction manual contains important information
about the installation and operation of waterflow detectors.
Purchasers who install waterflow detectors for use by oth-
ers must leave this manual or a copy of it with the user.
Read all instructions carefully before beginning. Follow
only those instructions that apply to the model you are in-
stalling.
CAUTION
Use vane-type waterflow detectors in wet-pipe systems
only. Do NOT use them in dry pipe, deluge, or preaction
systems. The sudden inrush of water in such systems may
break the vane or damage the mechanism.
Do not use in potentially explosive atmospheres. Do not al-
low unused wires to remain exposed.
Specifications
Contact Ratings: 10 A @ 125/250 VAC
2.5 A @ 24 VDC
Triggering Threshold Bandwidth (Flow Rate): 4 to 10 gpm
Static Pressure Rating: 250 PSI (Max) 2" – 8"
Dimensions, Installed: 3.5"H x 3.0"W x 6.7"D
Operating Temperature Range: 32°F to 120°F (0°C to 49°C)
Compatible Pipe: Steel water pipe, schedule 10 or 40.
Shipping Weight: 4 to 7 lb., according to size.
Enclosure Rating: NEMA 4, as tested by Underwriters Laboratories, Inc.
(requires optional Outdoor Cover Gasket Model WFDN4 and cover part #C58-164-01)
Principles Of Operation
Vane-type waterflow detectors mount to water-filled pipes
in sprinkler systems. Waterflow in the pipe deflects a vane,
which produces a switched output–usually after a specified
delay. All waterflow detectors have a pneumatically con-
trolled mechanical delay mechanism. Delays do NOT accu-
mulate; they reset if the flow of water stops before the
entire delay has elapsed. All switches actuate when the wa-
ter flow rate is 10 gallons per minute or greater, but will not
actuate if the flow rate is less than 4 gallons per minute.
This System Sensor installation manual covers the follow-
ing waterflow detectors for sprinkler/fire alarm applica-
tions.
Models
WFD20 Waterflow detector, Schedule 10/40, 2"
WFD25 Waterflow detector, Schedule 10/40, 2-1/2"
WFD30 Waterflow detector, Schedule 10/40, 3"
WFD35 Waterflow detector, Schedule 10/40, 3-1/2"
WFD40 Waterflow detector. Schedule 10/40, 4"
WFD50 Waterflow detector, Schedule 10/40, 5"
WFD60 Waterflow detector, Schedule 10/40, 6"
WFD80 Waterflow detector, Schedule 10/40, 8"
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System Sensor WFD20 Specifications

General

Type	Waterflow Detector
Switch Type	SPDT
Operating Temperature	32°F to 120°F (0°C to 49°C)
Size	2 inches
Minimum Flow Rate for Activation	10 GPM
Humidity Range	10% to 93% non-condensing

Summary

WFD Vane-type Waterflow Detectors

Specifications

Detailed technical specifications for the WFD detector, including contact ratings and pressure limits.

Important Safety and Operation Notes

Crucial notes and warnings for safe and proper installation and use of the waterflow detector.

Installation and Mounting Procedures

General installation guidelines and step-by-step instructions for physically mounting the waterflow detector.

Wiring and Pre-Operation Testing

Instructions for electrical wiring and pre-operation testing procedures for the waterflow detector.

Assembly Diagram

Visual representation of the waterflow detector's assembly and key components.

Delay Adjustment and Testing

Procedures for adjusting the pneumatic delay mechanism and operational testing of the detector.

Maintenance and Removal

Routine maintenance tasks and detailed steps for safely removing the waterflow detector.

Limitations and Warranty

Important limitations on device use and the manufacturer's warranty information.

WFDT/WFDTH Vane-type Waterflow Detectors

Specifications and Requirements

Technical specifications, tee depth requirements, and compatible pipe types for WFDT/WFDTH.

Installation and Operation

Guidelines for installation and explanation of how the WFDT/WFDTH detector operates.

Assembly, Mounting, and Wiring

Diagrams, mounting instructions, and field wiring for WFDT/WFDTH detectors.

Delay Adjustment and Testing

Procedures for mechanical delay adjustment and testing of WFDT/WFDTH detectors.

Maintenance and Limitations

Maintenance procedures, operational limitations, and warranty details for WFDT/WFDTH detectors.

WFDTNR Vane-type Waterflow Detector

Specifications and Tee Requirements

Technical specifications, tee depth requirements, and compatible pipe tees for the WFDTNR detector.

Installation and Operation Principles

General installation guidelines and principles of operation for the WFDTNR waterflow detector.

Assembly, Mounting, and Testing

Diagrams, mounting instructions, and pre-operation testing for the WFDTNR detector.

Field Wiring and Maintenance

Field wiring diagrams and maintenance procedures specific to the WFDTNR detector.

Limitations and Warranty

Important limitations on device use and the manufacturer's warranty information for WFDTNR.

OSY2 Gate Valve Supervisory Switch

Specifications and General Information

Technical specifications and general information for the OSY2 gate valve supervisory switch.

Installation Considerations and Procedure

Guidelines for installing OSY2 switches, including narrow and limited clearance valves.

Assembly Diagrams and Testing

Diagrams illustrating assembly and testing procedures for the OSY2 supervisory switch.

Wiring and Limitations

Wiring diagrams, device limitations, and warranty information for the OSY2 supervisory switch.

PIBV2 Post Indicator and Butterfly Valve Supervisory Switch

Specifications and General Information

Technical specifications and general information for the PIBV2 supervisory switch.

Post Indicator Valve Installation

Detailed instructions for installing the PIBV2 on post indicator valves.

Butterfly Valve Installation

Detailed instructions for installing the PIBV2 on butterfly valves.

Mounting Positions and Action Reversal

Acceptable mounting positions and procedures for reversing the switch action.

Wiring, Limitations, and Warranty

Wiring diagrams, device limitations, and warranty information for the PIBV2 switch.

Cover Tamper Switch

Specifications and General Information

Technical specifications and general information for the cover tamper switch.

Installation Guidelines and Mounting

Guidelines and steps for installing the cover tamper switch onto terminal blocks.

Field Wiring and Testing

Field wiring diagrams and operational testing procedures for the cover tamper switch.

Warranty

Manufacturer's warranty details for the cover tamper switch.

546-8000 Cover Tamper Switch

Specifications and General Information

Technical specifications and general information for the 546-8000 cover tamper switch.

Wiring Instructions and Diagrams

Instructions and diagrams for wiring the 546-8000 cover tamper switch to pressure switches.

Initiating Circuit Diagrams and Warranty

Diagrams of initiating circuits and warranty information for the 546-8000 cover tamper switch.

EPS10 Series Alarm Pressure Switches

Specifications, Operation, and Installation

Specs, operating principles, and initial installation steps for EPS10 alarm pressure switches.

Piping Diagrams and Wiring

Typical piping diagrams and wiring connection details for EPS10 series pressure switches.

Factory Settings and Adjustments

Factory settings and detailed procedures for adjusting EPS10 alarm pressure switches.

Warranty

Manufacturer's warranty information for EPS10 series alarm pressure switches.

EPS40/EPS120 Series Supervisory Pressure Switches

Specifications, Operation, and Installation

Specs, operation, and installation guidelines for EPS40/EPS120 supervisory pressure switches.

Piping Diagrams and Wiring

Piping diagrams and wiring connection tables for EPS40/EPS120 series pressure switches.

Factory Settings and Adjustments

Factory settings and detailed adjustment procedures for EPS40/EPS120 supervisory pressure switches.

Warranty

Manufacturer's warranty information for EPS40/EPS120 series supervisory pressure switches.

SSM and SSV BELL Series

Specifications and General Description

Technical specifications and general description of SSM and SSV bell series.

Installation and Testing Procedures

Procedures for installation and operational testing of SSM/SSV bells.

Wiring and Installation Types

Wiring diagrams and illustrations for surface and weatherproof installation of bells.

Limitations and Warranty

Limitations on bell operation and manufacturer's warranty information.